> On Jan 29, 2020, at 7:13 AM, Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> wrote: > > By the way, can READ_ONCE()/WRITE_ONCE() really solve this warning? > The link above says read/write on the same location ( mm/page_counter.c:129 ). > I don't know how READ_ONCE()/WRITE_ONCE() can solve the race. That looks like a different one where it complains about c->failcnt++. I’ll send a separate patch for that.